Big data plus IoT makes for a store that knows your needs better than you do. If you want to glimpse the retail store of the future, consider the following scenario. A shopper enters a store to buy shampoo. Instead of searching through several aisles, she opens an app on her smartphone that guides her to the aisle containing hair care products. Once there, the phone app offers promotions based on her shopping history, such as a 20 percent discount on a brand she buys regularly.